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(No Model.)

R. N. DYER.

PRINTING TELEGRAPH.

No. 335,275. Patented Feb. 2, 1886.

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NrTE STATES RICHARD N. DYER, OF NFJV YORK, N.

ATENT FFICEQ TELEGRAM COMPANY, OF SAME PLACE.

PRINTING-TELEGRAPH.

SPECIFICATION forming part of Letters Patent No. 335,275, d ted February 2, 1886.

Application filed October 15, 1883.

To all whom it may concern:

Be it known that I, RICHARD N. Dyna, of New York city, in the county and State of New York, have invented a certain new and useful Improvementin Printing-Telegraphs, ofwhich the following is a specification.

My invention relates to that class of stockquotation printers employing two type wheels on independent shafts, either of which typewheels can be moved to position and printed from while the other is at unison, such wheels being revolved in the same direction by independent motors, which exert a constant tend ency to turn them, and being controlled by escapements and by the unisonstops.

An instrument of the class referred to is shown in Patent No. 290,557.

The object of my invention is to produce a more simple and efficient mechanism than heretofore employed for controlling the movements of the type-wheels from one magnetarmature when the type-wheels are mounted upon shafts projecting in opposite directions, as distinguished from shafts one of which is a sleeve surrounding the other.

By my invention I make such shafts hollow, and pass completely through the center of both of them a third or escapement shaft. This third shaft has a scape-wheel, and a single pallet, operating to control the scape-wheel, is connected directly with the magnet-armature, and is vibrated thereby. The escapementshaft is coupled with the typewheel shafts by pawls and ratchets. The escapement-shaft is turned by both type-wheel shafts when both type wheels are revolving; but when one type-wheel is stopped at its blank space or unison the shaft of the other typewheel turns the escapementshaft alone, the pawl-and-ratchet connections permitting this to be done.

In the accompanying drawings, forming a part hereof, Figure 1 is an elevation and partial section of the mechanism; and Figs. 2 and 3 are sections on lines 2 2 and 3 3, respectiv elv.

A and B are the typewheels, arranged side by side and fixed on the ends of shafts C D. These shafts project in opposite directions from the type-wheels, which are on the adjoining inner ends of the shafts. The type- Serial X0. 179,916. (No model.)

wheel shafts are hollow, and centrally through both of them passes a third or escapement shaft, E.

Upon one end of shaftE is an escape-wheel, F, with which engages a pallet, G, connected rigidly with a polarized armature, H, vibrated by magnet I.

At the outer end of each type-wheel shaft is a ratchet-wheel, K, with which engages a pawl, L, carried by a disk or arm, M, secured to escapement-shaft E. These parts may of course be reversed, the ratchet-wheel being carried by the escapementshaft and the pawls by the type wheel shafts. 5

The type-wheel shafts are revolved in the same direction by motive power independently applied thereto. The motive power may be weight or spring trains, (not shown) terminating at the shafts in pinions a I).

The escape-wheel F and ratchct'wheels K are preferably of the same size, and have their teeth out together, so that they will be alike, in order that by a proper adj ustment the parts may work accurately and the pawl for the type-wheel shaft at rest drop into a tooth of its ratchet at each movement of the escapewheel.

The shafts C D are provided with radial stop-arms c (l, which are intercepted alternate- 8o ly by dogs a f, projecting from opposite sides of a rockshaft, N. \Vhen the r0ck-shaft Nis turned one way, one dog is thrown into the path of travel of a stop-arm, and by the same movement the other dog is moved clear of the 8 5 stop-arm for the other type-wheel shaft, always leaving one type-wheel shaft free to turn under control of the escapement.

The type-wheels have each a blank space, at which point no impression upon the paper strip will be made. The dogs of are arranged to stop the type-wheels at these points.

The mechanism described is mounted in'a suitable frame with the other parts ofthe instrument, which may be a two-wire instrument such as described in Patent No. 290,557" with a printing-magnet supplying power to lift the platen and rock the shaft N, and a neutral magnet in the type-wheel circuit with the magnet I, directing the application of the I00 platen movement to the rock-shaft in one direction or the other; or my invention may be applied to any other suitable form of stocle quotation printer where it is desired to control two type-wheels by one magnet. It will be seen that since the type-wheel shafts revolve in the same direction and apply their power to the escapement'shaft, (instead of receiving power from it,) the stopping of either type-wheel shaft does not prevent the other shaft from moving. If both type-wheels are at unison the vibration of the pallet causes but one of them to turnthat which is free from the rock-shaft N. The moving typewheel shaft turns the escapement-shaft, while the pawl of the other shaft rides over theteeth of its ratchet. By shifting the rock-shaft N the other shaft will be released and a dog will be thrown down to catch and stop the shaft that has been moving, when it reaches unison. Both wheels then revolve together, their pawls acting jointly to move the escapement-shaft until one reaches unison where it is stopped, while the other continues its movement to the letter or figure it is desired to prin its shaft alone turning the escapementshaft during this last period.

By the use of the 'escapeiuent-sha t passing centrally through the typewheel shafts, I am able to couple such shafts with an escapement common to both, no matter what their length may be; or each type-wheel may in turn be run to unison before the rock-shaft N is shifted, in which case only one type-wheel revolves at a time.

\Vhat I claim is- 1. In aprinting-telegraph, the col'nbination, with two independent type-wheel shafts projecting in opposite directions from the typewheels and separate power-connections with such shafts, of asinglepallet and single scapewheel connected with both of such shafts and controlling their movements, substantially as set forth.

2. In a printingtelegraph, the combination, with two independent type-wheel shafts projecting in opposite directions from the type- Wheels and separate power-connections with such shafts, of a single pallet and single scapewheel connected with both of such shafts and controlling their movements, a single vibratin g armature to which said pallet is connected, and means for stopping said type-wheel shafts at the blank or unison points, substantially as set forth.

3. In aprintiug-telegraph, the combination, with two independent hollow type-wheel shafts projecting in opposite directions from the type-wheels and separate power-connections with such shaft-s, of an escapement-shaft passing centrally through the type-wheel shafts and coupled with them, substantially as set forth.

at. In a printingtelegraph, the combination, with two independent hollow type wheel shafts projecting in opposite directions from the type-wheels, of an escapement-shaft passing centrally through the type-wheel shafts and pawls and ratchets connecting the escapementshaft with the type-wheel shafts, substantially as set forth.

5. In a printing-telegraph, the combination, with twoindependent hollow type-wheel shafts projecting in opposite directions from the type-wheels, of an escapeinent'shaft passing centrally through the type-wheel shafts and coupled therewith by pawls and ratchets, an escape-wheel on such escapementshaft, and a single pallet engaging said escape-wheel, substantially as set forth.

6. In a printing-telegraph, the combination, with two typewheel shafts revolved in the same direction by power applied separately thereto, such shafts being hollow and projecting in opposite directions from the typewheels, of an escapeinent-shaft passing centrally through the type wheel shafts and coupled therewith by pawls and ratchets, an escapewhcel on said escapement-shaft, a single pallet engaging said escape-wheel, and means for stopping said type-wheel shafts at the blank or unison points, substantially as set forth.

This specification signed and witnessed this 14th day of October, 1885.

RICHARD N. DYER.

Vitnesses:

N. W. KIDDLE, H. W. SEE EY. 

